The PSAT/NMSQT is a standardized test that measures critical reading, writing, and math skills. It is taken by over 3.5 million high school students each year as practice for the SAT and to qualify for National Merit Scholarships. The document provides an overview of the skills tested on the PSAT/NMSQT, including critical reading, math, and writing sections, and provides sample questions and test preparation strategies to help students succeed.